... (namely, 87% and 85%,respectively, receiving disease-modifying antirheumatic drugs;and 41% and 44%, respectively, receiving prednisolone).The mean age at disease onset in patients carrying the ... 6Relative risk for developing rheumatoid arthritis in patients, stratified for anti-cyclic citrullinated peptide (anti-CCP) antibodiesNonsmoking SmokingCases/controls Relative risk (95% confidence interval) ... that a missense single nucleotidepolymorphism resulting in a substitution of T for C at position1858 in the protein tyrosine phosphatase nonreceptor type 22(PTPN22) gene is associated with several...